Begin work on landing

src/landing/.web/utils/helpers/range.js

@@ -0,0 +1,43 @@
+/**
+ * Simulate the python range() builtin function.
+ * inspired by https://dev.to/guyariely/using-python-range-in-javascript-337p
+ * 
+ * If needed outside of an iterator context, use `Array.from(range(10))` or
+ * spread syntax `[...range(10)]` to get an array.
+ * 
+ * @param {number} start: the start or end of the range.
+ * @param {number} stop: the end of the range.
+ * @param {number} step: the step of the range.
+ * @returns {object} an object with a Symbol.iterator method over the range
+ */
+export default function range(start, stop, step) {
+    return {
+      [Symbol.iterator]() {
+        if (stop === undefined) {
+          stop = start;
+          start = 0;
+        }
+        if (step === undefined) {
+          step = 1;
+        }
+  
+        let i = start - step;
+  
+        return {
+          next() {
+            i += step;
+            if ((step > 0 && i < stop) || (step < 0 && i > stop)) {
+              return {
+                value: i,
+                done: false,
+              };
+            }
+            return {
+              value: undefined,
+              done: true,
+            };
+          },
+        };
+      },
+    };
+  }